8490439 has 2 divisors, whose sum is σ = 8490440. Its totient is φ = 8490438.

The previous prime is 8490421. The next prime is 8490457. The reversal of 8490439 is 9340948.

It is a balanced prime because it is at equal distance from previous prime (8490421) and next prime (8490457).

It is a cyclic number.

It is not a de Polignac number, because 8490439 - 2⁹ = 8489927 is a prime.

8490439 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8490398 and 8490407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8490499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245219 + 4245220.

It is an arithmetic number, because the mean of its divisors is an integer number (4245220).

Almost surely, 2^8490439 is an apocalyptic number.

8490439 is a deficient number, since it is larger than the sum of its proper divisors (1).

8490439 is an equidigital number, since it uses as much as digits as its factorization.

8490439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 8490439 is about 2913.8357880979. The cubic root of 8490439 is about 204.0062073595.

The spelling of 8490439 in words is "eight million, four hundred ninety thousand, four hundred thirty-nine".